File and Printer sharing troubles

I've installed Intrepid on a PS3, and I'm trying to share the printer I've installed with Win XP laptops on the network.

The PS3 can see the laptops and I can transfer files using the PS3, but XP can't see the PS3.

I have edited the /etc/samba/smb.conf file to change the workgroup to the same as the XP laptops (MSHOME), and restarted, but the XP machines still cannot see the PS3. Is there anything else I need to do to make the PS3 visable to the XP machines?

Thanks in advance!